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MC-8 

Controller 

Service Manual 

 
 

Harman Specialty Group 3 Oak Park, Bedford, MA, 01730-1413 USA   

Customer Service:  Telephone: 781-280-0300  | Service Fax: 781-280-0499  | www.lexicon.com 

Part No. 070-17536 |  Rev 0     

 

This document contains general safety and service instructions for the MC-8. It is important to read this manual 
before attempting service instructions. Pay particular attention to safety instructions. 

 

 

Appears on the component to indicate the presence of uninsulated, dangerous voltage 
inside the enclosure – voltage that may be sufficient to constitute a risk of shock. 

 

Appears on the component to indicate important operating and maintenance instructions 
in the accompanying literature. 

 

Calls attention to a procedure, practice, condition or the like that, if not correctly 
performed or adhered to, could result in injury or death. 

 

Calls attention to a procedure, practice, condition or the like that, if not correctly 
performed or adhered to, could result in damage or destruction to part or all of the 
product. 

Note: 

Calls attention to information that is essential to highlight. 

 

 

1.  Read and keep these instructions. 

2.  Heed all warnings.  

3.  Follow all operation instructions. 

4.  Do not use this apparatus near water. 

5.  Clean only with a dry cloth. 

6.  Do not block any ventilation openings. 

7.  Install in accordance with the manufacturer’s instructions. 

8.  Do not install near any heat sources such as radiators, heat registers, stoves, or another apparatus 

(including amplifiers) that produces heat. 

9.  Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades 

with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide 
blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult 
an electrician for replacement of the obsolete outlet. 

10.  Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and 

the point where they exit from the apparatus. 

11.  Only use attachments/accessories specified by the manufacturer.  

12.  Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with 

the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to 
avoid injury from tip-over. 

13.  Unplug this apparatus during lightning storms or when unused for long periods of time. 

14.  Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been 

damaged in any way, such as when a power-supply cord or plug is damaged, liquid has been spilled or 
objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not 
operate normally, or has been dropped. 

15.  Refer to the operating instructions for power requirements. Be advised that different operating voltages may 

require the use of different line cord and/or attachment plug. 

16.  Do not install the unit in an unventilated rack, or directly above heat-producing equipment such as power 

amplifiers. Observe the maximum ambient operating temperature listed in the product specification. 

17.  Never attach audio power amplifier outputs directly to any of the unit’s connectors. 

18.  To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. 

19.  This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to 

Part 15 of FCC Rules. 

These limits are designed to provide reasonable protection against harmful interference in a residential 
installation. This equipment generates, uses, and radiates radio frequency energy and, if not installed and used 
in accordance with the instructions, may cause harmful interference to radio or television reception, which can 
be determined by turning the equipment off and on. The user is encouraged to try to correct the interference by 
one or more of the following measures: 

•  Re-orient or relocate the receiving antenna. 
•  Increase the separation between the equipment and the receiver. 
•  Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
•  Consult the dealer or an experienced radio/ television technician for help. 

 

The following general safety precautions must be observed during all phases of operation, service, and repair of 
this unit. Failure to comply with these precautions or with specific warnings elsewhere in these instructions 
violates manufacturer safety standards and intended use of this unit. Harman Specialty Group assumes no 
liability for failure to comply with these requirements. 

To minimize shock hazard, the unit chassis and cabinet must be connected to an electrical ground. The unit is 
equipped with a three-wire grounding type plug. It will only fit into a grounding type power outlet. This is a safety 
feature. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete 
outlet. Do not defeat the safety purpose of the grounding type plug. 

Do not operate the unit in the presence of flammable gasses or fumes. Operation of any electrical instrument in 
such an environment constitutes a definite safety hazard. 

Operating personnel must not remove unit covers. Qualified maintenance personnel must make component 
replacements and internal adjustments. Do not replace components with the power cord connected. Under 
certain conditions, dangerous voltages may exist even with the power cord removed. To avoid personal injuries, 
always disconnect power and discharge circuits before touching them. 

Do not attempt internal service or adjustment unless another person capable of rendering first-aid resuscitation 
is present. 

Because of the danger of introducing additional hazards, do not install substitute parts or perform any 
unauthorized modification to the unit. 

Warnings such as the example shown below precede potentially dangerous procedures throughout this 
document. Instructions contained in warnings must be followed.